/*
 *  Copyright 2019-2020 Zheng Jie
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package me.zhengjie.aspect;

import cn.hutool.extra.servlet.ServletUtil;
import javax.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;
import me.zhengjie.domain.Log;
import me.zhengjie.service.LogService;
import me.zhengjie.utils.RequestHolder;
import me.zhengjie.utils.SecurityUtils;
import me.zhengjie.utils.StringUtils;
import me.zhengjie.utils.ThrowableUtil;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

/**
 * @author Zheng Jie
 * @date 2018-11-24
 */
@Component
@Aspect
@Slf4j
public class LogAspect {

  private final LogService logService;

  ThreadLocal<Long> currentTime = new ThreadLocal<>();

  public LogAspect(LogService logService) {
    this.logService = logService;
  }

  /**
   * 配置切入点
   */
  @Pointcut("@annotation(me.zhengjie.annotation.Log)")
  public void logPointcut() {
    // 该方法无方法体,主要为了让同类中其他方法使用此切入点
  }

  /**
   * 配置环绕通知,使用在方法logPointcut()上注册的切入点
   *
   * @param joinPoint join point for advice
   */
  @Around("logPointcut()")
  public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable {
    Object result;
    currentTime.set(System.currentTimeMillis());
    result = joinPoint.proceed();
    Log log = new Log("INFO", System.currentTimeMillis() - currentTime.get());
    currentTime.remove();
    HttpServletRequest request = RequestHolder.getHttpServletRequest();
    logService
        .save(getUsername(), StringUtils.getBrowser(request), ServletUtil.getClientIP(request),
            joinPoint, log);
    return result;
  }

  /**
   * 配置异常通知
   *
   * @param joinPoint join point for advice
   * @param e         exception
   */
  @AfterThrowing(pointcut = "logPointcut()", throwing = "e")
  public void logAfterThrowing(JoinPoint joinPoint, Throwable e) {
    Log log = new Log("ERROR", System.currentTimeMillis() - currentTime.get());
    currentTime.remove();
    log.setExceptionDetail(ThrowableUtil.getStackTrace(e).getBytes());
    HttpServletRequest request = RequestHolder.getHttpServletRequest();
    logService
        .save(getUsername(), StringUtils.getBrowser(request), ServletUtil.getClientIP(request),
            (ProceedingJoinPoint) joinPoint, log);
  }

  public String getUsername() {
    try {
      return SecurityUtils.getCurrentUsername();
    } catch (Exception e) {
      return "";
    }
  }
}
